Is only duo lingo exam preferable for applying to Universities or is it mandatory for gre?Will there be any problem in visa only with duo lingo?

Duolingo is just a language proficiency test and not the only mandate to study abroad. Apart from Duolingo or any other Language Proficiency Test for that matter, there are a lot of other aspects that the Adcom will look for in your profile. The other important factors in an application include:
1. Bachelor’s GPA

2. GMAT/GRE Score

3. Extracurricullars

4. Work Experience

5. SOPs and Essays

GRE is an important aspect that is used by schools abroad to judge your ability to understand the subject and check if you are academically capable enough to pursue the course that you are applying for. Thus, I highly suggest that you attempt the GRE with complete preparation. Here is a list of the best GRE Books to Score 320+

1. Kaplan GRE Prep Plus 2022

Pros:

Comes with lots of online supplementary materials.

Two full-length practice tests

The online practice tests are similar to the official computer-based GRE test.

Gives techniques in approaching difficult questions

Cons:

Recent editions have fewer online materials.

2. Manhattan 5lb. Book GRE Practice Problems

Pros:

Includes 1,800+ practice problems.

Comes with online learning modules

Perfect for daily practice and preparation.

Cons:

No indication of question difficulty

3. ETS GRE Prep Book: The Official Guide

Pros:

Has the most authentic questions

Comes with the GRE PowerPrep software from ETS

Two online GRE practice tests are computer-adaptive

Cons:

The 3rd edition is almost identical to the 2nd edition.

Doesn’t provide many test-taking strategies

4. Magoosh GRE Prep Book

Pros:

Provides plentiful mobile and online learning resources

Questions come with statistics and difficulty ratings.

Great quantitative section focus

Cons:

The verbal section needs work.

The pacing of the difficulty of questions is all over the place.

Not many practice questions

5. Manhattan GRE Prep Set of 8 Strategy Guides

Pros:

The GRE books include access to six online GRE practice tests.

Comprehensive and easy to understand

A complete guide for brushing up on fundamentals

Cons:

Not many practice questions

If you need any help in applying to your dream schools abroad, you can get in touch with Study Abroad Experts here. They will help you with all the information as well as assist you in the application process for FREE.